基于DSP芯片为控制核心，设计了语音处理系统，有效地解决了高性能与低成本间的矛盾。系统的硬件部分包括数字信号处理芯片、音频CODEC模块、电源模块、滤波电路、JTAG 仿真接口等几大模块，系统的软件部分介绍了语音识别的基本原理,阐述了DSP实现技术，探讨并验证小波变换算法比傅里叶变换算法在提高语音识别系统性能应用中的有效性。该系统资源丰富，电路兼有模拟和数字信号接口，可以作为一个独立的模块应用于其他电路，方便地扩展其应用。-The design of speech process system is based on the DSP chip, which solve the contradiction between high performance and low cost effectively. The part of sampling circuit is composed of Digital signal processing chip, voice-frequency circuit, filtering circuit, simulation of JTAG interface. The part of software introduces the fundamental theory of speech recognition, explaining the DSP realization technology of speech recognition. The system is rich in resources and the circuit provides interfaces with analog and digital signal, and could be taken as an independent module to be used for other electronic circuits, making it convenient to expand its application.